Electrodeposition of indium-thallium shape memory alloys
AssigneeUniversity of Missouri
InventorThomas J. O'Keefe
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Abstract
A process for preparing an indium-thallium alloy which exhibits shape memory transformation at a temperature greater than that temperature at which shape memory transformation would occur for a thermally prepared alloy of the same composition. The process includes providing an article for use as a cathode, providing an electrolyte which comprises indium and thallium ions, and electrodepositing an indium-thallium alloy having between about 21 and about 35 atomic percent thallium onto the article. A process for preparing an article constructed of an electrodeposited indium-thallium alloy which exhibits shape memory effect. An electrodeposited indium-based shape memory alloy.
Claims14
A process for preparing an indium-thallium alloy which exhibits shape memory transformation at a temperature greater than that temperature at which shape memory transformation would occur for a thermally prepared alloy of the same composition, the process comprising:
- providing an article for use as a cathode;
- providing an electrolyte by dissolving indium sulfate and thallium sulfate in an acidic solution;
- electrodepositing the indium-thallium alloy onto the article, the indium-thallium alloy comprising between about 21 and about 35 atomic percent thallium.
A process for preparing an article constructed of an electrodeposited indium-thallium alloy which exhibits shape memory effect, the process comprising:
- providing an electrodeposited indium-thallium alloy having between about 21 and about 35 atomic percent thallium, said alloy exhibiting shape memory transformation at a temperature greater than that at which shape memory transformation would occur for a thermally prepared alloy of the same composition;
- establishing a first configuration of the article at a first higher temperature, said first higher temperature being a temperature greater than the martensitic transformation temperature for the alloy;
- establishing a second configuration by deforming the article at a second lower temperature, said second lower temperature being a temperature less than the martensitic transformation temperature for the alloy.
A process for preparing an indium-thallium alloy which exhibits shape memory transformation at a temperature greater than that temperature at which shape memory transformation would occur for a thermally prepared alloy of the same composition, the process comprising:
- providing an article for use as a cathode;
- providing an electrolyte which comprises indium and thallium ions;
- electrodepositing the indium-thallium alloy onto the article by providing pulsed current to the electrolyte, the indium-thallium alloy comprising between about 21 and about 35 atomic percent thallium.
Dependencies are inferred from the claim text.